NAME

mps — LSI Fusion-MPT 2 Serial Attached SCSI driver

SYNOPSIS

To compile this driver into your kernel, place the following lines in your kernel
configuration file:
devicescbusdevicemps
Or, to load the driver as a module at boot, place the following line in loader.conf(5):
mps_load="YES"

CONFIGURATION

To disable MSI interrupts for all mps driver instances, set the following tunable value in
loader.conf(5):
hw.mps.disable_msi=1
To disable MSI interrupts for a specific mps driver instance, set the following tunable
value in loader.conf(5):
dev.mps.X.disable_msi=1
where X is the adapter number.
To disable MSI-X interrupts for all mps driver instances, set the following tunable value in
loader.conf(5):
hw.mps.disable_msix=1
To disable MSI-X interrupts for a specific mps driver instance, set the following tunable
value in loader.conf(5):
dev.mps.X.disable_msix=1
To set the maximum number of DMA chains allocated for all adapters, set the following
variable in loader.conf(5):
hw.mps.max_chains=NNNN
To set the maximum number of DMA chains allocated for a specific adapter, set the following
variable in loader.conf(5):
dev.mps.X.max_chains=NNNN
This variable may also be viewed via sysctl(8) to see the maximum set for a given adapter.
The current number of free chain frames may be seen via the dev.mps.X.chain_free sysctl(8)
variable.
The lowest number of free chain frames may be seen via the dev.mps.X.chain_free_lowwater
sysctl(8) variable.
The current number of active I/O commands is shown in the dev.mps.X.io_cmds_active sysctl(8)
variable.
The maximum number of active I/O command seen since boot is shown in the
dev.mps.X.io_cmds_highwater sysctl(8) variable.

DEBUGGING

To enable debugging prints from the mps driver, set the
hw.mps.X.debug_level
variable, where X is the adapter number, either in loader.conf(5) or via sysctl(8). The
following bits have the described effects:
0x01 Enable informational prints.
0x02 Enable tracing prints.
0x04 Enable prints for driver faults.
0x08 Enable prints for controller events.

SEEALSO

HISTORY

AUTHORS

The mps driver was originally written by Scott Long <scottl@FreeBSD.org>. It has been
improved and tested by LSI Logic Corporation. This man page was written by Ken Merry
<ken@FreeBSD.org>.

BUGS

This driver has a couple of known shortcomings:
· No userland utility available (e.g. mptutil(8)).
· The driver probes devices sequentially. If your system has a large number of devices,
the probe will take a while.